linux-kernel - Re: What about make mergeconfig ?

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Message-Id: <1161759599.27622.54.camel@shinybook.infradead.org>
Date:	Wed, 25 Oct 2006 07:59:59 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Sam Ravnborg <sam@...nborg.org>
Subject: Re: What about make mergeconfig ?

On Wed, 2006-10-25 at 15:46 +1000, Benjamin Herrenschmidt wrote:
> 
> make mergeconfig <path_to_file>
> 
> That would merge all entries in the specified file with the
> current .config. By mergeing, that basically means that rule:
> 
> N + N = N
> m + N = m
> Y + N = Y
> m + Y = Y  

We have something vaguely similar in the Fedora package (I think it's
only in the CVS tree rather than in the SRPM itself, but the CVS tree is
public too).

http://cvs.fedora.redhat.com/viewcvs/*checkout*/rpms/kernel/devel/merge.pl?rev=1.9

It doesn't do quite what you asked for -- it works with 'incremental'
configuration. So any options specified in _any_ form in the second
config are overridden in the output. It lets us start with a generic
config, then apply options (turning stuff both on and off) for PowerPC
in general, and then for specific builds on top of that.

-- 
dwmw2

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